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    Distribution: <a href="https://metacpan.org/dist/inc-latest">inc-latest</a>
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    Module version: 0.500
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  <div class="toc-header"><strong>Contents</strong></div>
<ul>
  <li><a href="./inc::latest.html#NAME">NAME</a></li>
  <li><a href="./inc::latest.html#VERSION">VERSION</a></li>
  <li><a href="./inc::latest.html#SYNOPSIS">SYNOPSIS</a></li>
  <li><a href="./inc::latest.html#DESCRIPTION">DESCRIPTION</a>
    <ul>
      <li><a href="./inc::latest.html#Special-notes-on-bundling">Special notes on bundling</a></li>
      <li><a href="./inc::latest.html#Managing-dependency-chains">Managing dependency chains</a></li>
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  <li><a href="./inc::latest.html#USAGE">USAGE</a>
    <ul>
      <li><a href="./inc::latest.html#As-bundled-in-inc/">As bundled in inc/</a></li>
      <li><a href="./inc::latest.html#Author-mode">Author-mode</a></li>
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<h1 id="NAME">NAME</h1>

<p>inc::latest - use modules bundled in inc/ if they are newer than installed ones</p>

<h1 id="VERSION">VERSION</h1>

<p>version 0.500</p>

<h1 id="SYNOPSIS">SYNOPSIS</h1>

<pre><code>  # in Makefile.PL or Build.PL
  use inc::latest &#39;Some::Configure::Prereq&#39;;</code></pre>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p><b>WARNING -- THIS IS AN EXPERIMENTAL MODULE</b>. It was originally bundled (as an experiment) with <a href="./Module::Build.html">Module::Build</a> and has been split out for more general use.</p>

<p>The <code>inc::latest</code> module helps bootstrap configure-time dependencies for CPAN distributions. These dependencies get bundled into the <code>inc</code> directory within a distribution and are used by <i>Makefile.PL</i> or <i>Build.PL</i>.</p>

<p>Arguments to <code>inc::latest</code> are module names that are checked against both the current <code>@INC</code> array and against specially-named directories in <code>inc</code>. If the bundled version is newer than the installed one (or the module isn&#39;t installed, then, the bundled directory is added to the start of <code>@INC</code> and the module is loaded from there.</p>

<p>There are actually two variations of <code>inc::latest</code> -- one for authors and one for the <code>inc</code> directory. For distribution authors, the <code>inc::latest</code> installed in the system will record modules loaded via <code>inc::latest</code> and can be used to create the bundled files in <code>inc</code>, including writing the second variation as <code>inc/latest.pm</code>.</p>

<p>This second <code>inc::latest</code> is the one that is loaded in a distribution being installed (e.g. from <i>Makefile.PL</i> or <i>Build.PL</i>). This bundled <code>inc::latest</code> is the one that determines which module to load.</p>

<h2 id="Special-notes-on-bundling"><a id="Special"></a>Special notes on bundling</h2>

<p>The <code>inc::latest</code> module creates bundled directories based on the packlist file of an installed distribution. Even though <code>inc::latest</code> takes module name arguments, it is better to think of it as bundling and making available entire <i>distributions</i>. When a module is loaded through <code>inc::latest</code>, it looks in all bundled distributions in <code>inc/</code> for a newer module than can be found in the existing <code>@INC</code> array.</p>

<p>Thus, the module-name provided should usually be the &quot;top-level&quot; module name of a distribution, though this is not strictly required. <code>inc::latest</code> has a number of heuristics to discover module names, allowing users to do things like this:</p>

<pre><code>  use inc::latest &#39;Devel::AssertOS::Unix&#39;;</code></pre>

<p>even though Devel::AssertOS::Unix is contained within the Devel-CheckOS distribution.</p>

<p>At the current time, packlists are required. Thus, bundling dual-core modules may require a &#39;forced install&#39; over versions in the latest version of perl in order to create the necessary packlist for bundling.</p>

<h2 id="Managing-dependency-chains"><a id="Managing"></a>Managing dependency chains</h2>

<p>Before bundling a distribution you must ensure that all prerequisites are also bundled and load in the correct order.</p>

<p>For example, if you need <code>Wibble</code>, but <code>Wibble</code> depends on <code>Wobble</code>, and you have bundled <code>Module::Build</code>, your <i>Build.PL</i> might look like this:</p>

<pre><code>  use inc::latest &#39;Wobble&#39;;
  use inc::latest &#39;Wibble&#39;;
  use inc::latest &#39;Module::Build&#39;;

  Module::Build-&gt;new(
    module_name =&gt; &#39;Foo::Bar&#39;,
    license =&gt; &#39;perl&#39;,
  )-&gt;create_build_script;</code></pre>

<p>Authors are strongly suggested to limit the bundling of additional dependencies if at all possible and to carefully test their distribution tarballs before uploading to CPAN.</p>

<h1 id="USAGE">USAGE</h1>

<h2 id="As-bundled-in-inc/"><a id="As"></a><a id="As-bundled-in-inc"></a>As bundled in inc/</h2>

<p>Using <a href="./inc::latest.html#Author-mode">&quot;Author-mode&quot;</a>, a special stub module will be created in your distribute directory as <i>inc/latest.pm</i>. In your <i>Makefile.PL</i> or <i>Build.PL</i>, you can then load <code>inc::latest</code> to load bundled modules.</p>

<p>When calling <code>use</code>, the bundled <code>inc::latest</code> takes a single module name and optional arguments to pass to that module&#39;s own import method.</p>

<pre><code>  use inc::latest &#39;Foo::Bar&#39; qw/foo bar baz/;</code></pre>

<p>The implementation is private. Only the <code>import</code> method is public.</p>

<h2 id="Author-mode"><a id="Author"></a>Author-mode</h2>

<p>When you have <a href="./inc::latest.html">inc::latest</a> installed from CPAN, then you are in author-mode if any of the Author-mode methods are available. For example:</p>

<pre><code>  if ( inc::latest-&gt;can(&#39;write&#39;) ) {
    inc::latest-&gt;write(&#39;inc&#39;);
  }</code></pre>

<p>Using author-mode, you can create the stub <i>inc/latest.pm</i> and bundle modules into <i>inc</i>.</p>

<dl>

<dt id="loaded_modules()"><a id="loaded_modules"></a>loaded_modules()</dt>
<dd>

<pre><code>  my @list = inc::latest-&gt;loaded_modules;</code></pre>

<p>This takes no arguments and always returns a list of module names requested for loading via &quot;use inc::latest &#39;MODULE&#39;&quot;, regardless of whether the load was successful or not.</p>

</dd>
<dt id="write()"><a id="write"></a>write()</dt>
<dd>

<pre><code>  inc::latest-&gt;write( &#39;inc&#39; );</code></pre>

<p>This writes the bundled version of inc::latest to the directory name given as an argument. It almost all cases, it should be &#39;<code>inc</code>&#39;.</p>

</dd>
<dt id="bundle_module()"><a id="bundle_module"></a>bundle_module()</dt>
<dd>

<pre><code>  for my $mod ( inc::latest-&gt;loaded_modules ) {
    inc::latest-&gt;bundle_module($mod, $dir);
  }</code></pre>

<p>If $mod corresponds to a packlist, then this function creates a specially-named directory in $dir and copies all .pm files from the modlist to the new directory (which almost always should just be &#39;inc&#39;). For example, if Foo::Bar is the name of the module, and $dir is &#39;inc&#39;, then the directory would be &#39;inc/inc_Foo-Bar&#39; and contain files like this:</p>

<pre><code>  inc/inc_Foo-Bar/Foo/Bar.pm</code></pre>

<p>Currently, $mod <b>must</b> have a packlist. If this is not the case (e.g. for a dual-core module), then the bundling will fail. You may be able to create a packlist by forced installing the module on top of the version that came with core Perl.</p>

</dd>
</dl>

<h1 id="SUPPORT">SUPPORT</h1>

<h2 id="Bugs-/-Feature-Requests"><a id="Bugs"></a><a id="Bugs---Feature-Requests"></a>Bugs / Feature Requests</h2>

<p>Please report any bugs or feature requests through the issue tracker at <a href="https://github.com/dagolden/inc-latest/issues">https://github.com/dagolden/inc-latest/issues</a>. You will be notified automatically of any progress on your issue.</p>

<h2 id="Source-Code"><a id="Source"></a>Source Code</h2>

<p>This is open source software. The code repository is available for public review and contribution under the terms of the license.</p>

<p><a href="https://github.com/dagolden/inc-latest">https://github.com/dagolden/inc-latest</a></p>

<pre><code>  git clone https://github.com/dagolden/inc-latest.git</code></pre>

<h1 id="AUTHORS">AUTHORS</h1>

<ul>

<li><p>David Golden &lt;dagolden@cpan.org&gt;</p>

</li>
<li><p>Eric Wilhelm &lt;ewilhelm@cpan.org&gt;</p>

</li>
</ul>

<h1 id="COPYRIGHT-AND-LICENSE"><a id="COPYRIGHT"></a>COPYRIGHT AND LICENSE</h1>

<p>This software is Copyright (c) 2009 by David Golden.</p>

<p>This is free software, licensed under:</p>

<pre><code>  The Apache License, Version 2.0, January 2004</code></pre></div>

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